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Method for operating a filter press and a filter press

a filter press and filter technology, applied in the direction of filtration separation, separation process, chemistry apparatus and process, etc., can solve the problem of additional maintenan

Active Publication Date: 2020-06-11
METSO OUTOTEC (FINLAND) OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method and filter press that can make the construction process simpler and more robust. This is achieved by using a compression gas to compress the filter cake, which helps to extract residual liquid content without the need for a separate membrane or diaphragm element.

Problems solved by technology

Such arrangements provide good results in extracting the liquid contents of the filter material, but requires a complex structure and introduces additional components which are subject to wear, and thus, additional maintenance.

Method used

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  • Method for operating a filter press and a filter press
  • Method for operating a filter press and a filter press
  • Method for operating a filter press and a filter press

Examples

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Embodiment Construction

[0015]According to a first aspect of the present disclosure, a method of operating a filter press 1 is provided. In the method, filter material is fed into a filter chamber 2 so as to separate filtrate from solids with a flexible filter medium 3, and to form a filter cake within the filter chamber 2 between at least two sides of said filter medium. As the filter medium 3 has at least two sides, filtrate may suitably be received through said at least sides during feeding of filter material Filtrate is received from the filter chamber 2 through the filter medium 3. That is, filtrate is collected, drained and passed further on. Thereafter, the filter cake formed within the filter chamber 2 is discharge therefrom.

[0016]The method further comprises, prior to discharging the filter cake, applying compression on the filter cake formed within the filter chamber 2. This is done by providing compression gas directly on a side of the filter medium 3 exterior to the filter chamber 2, so as to e...

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Abstract

A method of operating a filter press, wherein filter material is fed into a filter chamber so as to form a filter cake between at least two sides of a flexible said filter medium. Filtrate is received from the filter chamber and the filter cake formed the filter chamber is discharged. Prior to discharging the filter cake, compression is applied on the filter cake formed within the filter chamber by providing compression fluid gas at a compression pressure exceeding a prevailing pressure within the filter chamber, directly on a side of the filter medium exterior to the filter chamber, so as to exert said compression pressure directly on said side of the filter medium, thereby causing the filter medium to yield against the filter cake.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of PCT International Application No. PCT / FI2017 / 050593 filed Aug. 23, 2017, the disclosure of this application is expressly incorporated herein by reference in its entirety.FIELD OF THE DISCLOSURE[0002]The present disclosure relates to a method of operating a filter press.BACKGROUND OF THE DISCLOSURE[0003]Conventional filter presses are well known in the art. Commonly, a filter press comprises a filter chamber into which filter material, such as slurry, is fed. The solids content of the filter material is separated from the liquid contents thereof by a filter medium, such as a liquid permeable filter cloth. The liquid portion is recovered from the filter chamber via a drainage arrangement, whereas the solids content forms filter cake within the filter chamber.[0004]To further extract liquid content form the filter cake, it is often squeezed by diaphragm or membrane element, compressed against the filter ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D25/12B01D29/82B01D29/84
CPCB01D25/125B01D29/843B01D29/822B01D25/124B01D25/164B01D25/284B01D25/285
Inventor BOHNKE, BERND
Owner METSO OUTOTEC (FINLAND) OY
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